海浪同化预报模型理论基础(英文)

Fundamental Theory of Wave Assimilation Prediction Model

将共轭变分同化方法应用于 LAGFD- WAM海浪数值模式 ,导出了海浪谱能量平衡方程的共轭方程以及风输入、破碎、底摩擦、波波非线性相互作用和波流相互作用的相应共轭源函数 ,建立了海浪同化模型 ,数值计算仍采用特征线嵌入计算格式 。

The adjoint variational method applied to wave data assimilation in the LAGFD WAM wave model is proposed. Since the SAR imaging mechanism is now well understood, wave directional spectra can be retrieved from the SAR image spectra. An assimilation system based on the wave number energy spectrum balance equation is developed here. The adjoint equation, which is of great importance in the system is derived from the wave number energy spectrum balance equation, and the complicated characteristic inlaid computational scheme applied to the adjoint wave spectrum equation is also discussed for practical numerical simulation.